From: Jon Steinhart
I use UNIX instead of Unix as that's what I
believe is the correct form.
Well, Bell documentation uses "UNIX" through V6:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=V6/usr/doc/start/start
"Unix" starts to appear with V7:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=V7/usr/doc/setup
As mentioned, the trademark is "UNIX".
I don't really have a fixed position on _the_ way to spell it: when I'm
wiriting about a specific version (e.g. V6) I use the capitalization as of
that version; for general text I'd probably use 'Unix', as that seems to
be
general now. But I could easily be convinced otherwise.
Noel